Browsing by Keyword "Ocean energy"
Now showing 1 - 5 of 5
Results Per Page
Sort Options
Item Applying International Power Quality Standards for Current Harmonic Distortion to Wave Energy Converters and Verified Device Emulators(2019-09-24) Kelly, James; Aldaiturriaga, Endika; Ruiz-Minguela, Pablo; Tecnalia Research & InnovationThe push for carbon-free energy sources has helped encourage the development of the ocean renewable energy sector. As ocean renewable energy approaches commercial maturity, the industry must be able to prove it can provide clean electrical power of good quality for consumers. As part of the EU funded Open Sea Operating Experience to Reduce Wave Energy Cost (OPERA) project that is tasked with developing the wave energy sector, the International Electrotechnical Commission (IEC) developed electrical power quality standards for marine energy converters, which were applied to an oscillating water column (OWC). This was done both in the laboratory and in the real world. Precise electrical monitoring equipment was installed in the Mutriku Wave Power Plant in Spain and to an OWC emulator in the Lir National Ocean Test Facility at University College Cork in Ireland to monitor the electrical power of both. The electrical power generated was analysed for harmonic current distortion and the results were compared. The observations from sea trials and laboratory trials demonstrate that laboratory emulators can be used in early stage development to identify the harmonic characteristics of a wave energy converter.Item Global review of recent ocean energy activities(2013) Melo, Ana Brito; Sweeney, Eoin; Villate, Jose Luis; GENERALOcean energy is regarded as an important future source of energy generation in many countries for transition to a low-carbon future. While commercial interest in ocean energy is growing significantly at a global level, there are considerable investment costs and bottlenecks that will need to be overcome. Research and funds are spread over many different wave and marine current energy concepts under development, and there is still no technology convergence, in contrast to what happened in wind energy. Although an important marine energy resource, discussion of offshore wind energy is not included in this manuscript. This article focuses on the latest developments in ocean energy-in particular, open-sea testing facilities set up by several countries as a measure to encourage deployment and streamlining procedures-and gives an overview of projects going into the water this past year. In addition, the article highlights the importance of collaborative research and development on ocean energy projects and the unique role of the Ocean Energy Systems Implementing Agreement as an intergovernmental organization promoting the use of ocean energy (wave, marine currents, tidal, ocean thermal gradients and salinity gradients) for energy extraction.Item Installation, operation and maintenance of offshore renewables(Institution of Engineering and Technology, 2019-01-01) Nava, Vincenzo; Ruiz-Minguela, Pablo; Pérez-Morán, Germán; Rodríguez-Arias, Raúl; Lopez-Mendia, Joseba; Villate-Martínez, José Luis; RENOVABLES OFFSHORE; Tecnalia Research & Innovation; GENERALThe chapter deals with the basic concepts of installation, operation and maintenance of offshore renewable energy systems. Whilst focus is given to the offshore wind industry, the extension to ocean energy (wave and tidal) offers a wider perspective on the major issues concerning the installation and maintenance. A reliability-based approach has been adopted for the analysis of the failures, providing an overview about the most common functional decomposition methodologies as well as logistic requirements for the different operations at the various stages of the lifetime of an offshore renewable project. The economic modelling of the operations, based on strategies for their planning, briefly completes the chapter.Item Measuring progress towards ocean energy commercialisation(2023-11) Ruiz-Minguela, Pablo; Wong, Pui Wah; Noble, Donald R.; Jeffrey, Henry; Villate, Jose Luis; RENOVABLES OFFSHORE; GENERALThe EU aims to achieve climate neutrality by 2050 through the European Green Deal and its commitment to global climate action under the Paris Agreement. Transitioning to a carbon-neutral society requires increasing the share of renewable energy across different sectors. Ocean energy can contribute to job creation, economic revitalization, and grid balancing. However, public funding and financial instruments are necessary to reduce risks, advance technology, and to support demonstration and pre-commercial projects in the ocean energy sector. The SEETIP Ocean project, supported by the European Commission through the Horizon Europe framework programme, aims to accelerate the deployment of the ocean energy sector by promoting collaboration among stakeholders. As part of the project, an analysis is being conducted to assess technological progress, identify implementation gaps, and update the Strategic Research and Innovation Agenda (SRIA) for Ocean Energy. The analysis reveals reasonable progress in research and innovation, albeit with smaller project sizes compared to current SRIA recommendations, and the need for increased support from national programmes. Some topics have been covered more than proposed funding and number of projects, while others not at all. This highlights the need for effective communication and collaboration between both the European Commission and Member State funders and their programmes. In addition, public support and funding is crucial to lower investment risks and propel ocean energy technologies towards commercialisation. With appropriate funding and policy support, the European ocean energy sector could strengthen its position as a worldwide leader and harness the socio-economic benefits from the sector.Item O&M Models for Ocean Energy Converters: Calibrating through Real Sea Data: Calibrating through real sea data(2019) Bloise Thomaz, Tianna; Crooks, David; Medina-Lopez, Encarni; van Velzen, Leonore; Jeffrey, Henry; Lopez Mendia, Joseba; Rodriguez Arias, Raul; Ruiz Minguela, Pablo; Tecnalia Research & Innovation; RENOVABLES OFFSHOREOf the cost centres that combine to result in Levelised Cost of Energy (LCOE), O&M costs play a significant part. Several developers have calculated component costs, demonstrating how they can become commercially competitive with other forms of renewable energy. However, there are uncertainties relating to the O&M figures that can only be reduced through lessons learned at sea. This work presents an O&M model calibrated with data from real sea experience of a wave energy device deployed at the Biscay Marine energy Platform (BiMEP): the OPERA O&M Model. Two additional case studies, utilising two other O&M calculation methodologies, are presented for comparison with the OPERA O&M Model. The second case study assumes the inexistence of an O&M model, utilising a Simplified Approach. The third case study applies DTOcean’s (a design tool for ocean energy arrays) O&M module. The results illustrate the potential advantages of utilising real sea data for the calibration and development of an O&M model. The Simplified Approach was observed to overestimate LCOE when compared to the OPERA O&M Model. This work also shows that O&M models can be used for the definition of optimal maintenance plans to assist with OPEX reduction.